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Factors affecting the abundance of fall chinook salmon in the Columbia River

Creator:: Van Hyning, Jack M.
Abstract:: A study of the population ecology of Columbia River fall chinook salmon, Oncorhynchus tshawytscha (Walbaum), was made in an attempt to determine the cause of a serious decline in this run which occurred in the early 1950's. Fluctuations in abundance of major salmon runs the North Pacific were examined to...
Resource Type:: Dissertation
Full Text:: early aid and encouragement of Dr. Donald W. Chapman and the patience and assistance of Dr. Thomas E

Reproduction in the eastern cottontail rabbit in Oregon

Creator:: Trethewey, Donald Edwin
Abstract:: Reproductive characteristics of introduced eastern cottontail rabbits, Sylvilagus floridanus (J. A. Allen), were determined from 486 rabbits collected between January 1, 1968 and June 30, 1969, near Corvallis, Oregon. Sex ratios were 1:1 for all rabbits collected and for all embryos 20 days or more gestation. On the basis of...
Resource Type:: Masters Thesis
Full Text:: throughout. Additional thanks are due the following: Howard M. Wight and Lee W. Kuhn, Department of

The reproductive biology of the mountain cottontail rabbit in Oregon

Creator:: Powers, Roger Alan
Abstract:: The reproductive characteristics of the mountain cottontail rabbit, Sylvilagus nuttalli (Bachman), were investigated from 269 specimens collected in central Oregon between 28 May 1968 and 28 August 1969. Male rabbits were in breeding condition between mid-February and 3 July 1969. Nearly 77% of the females bore four litters between 7...
Resource Type:: Masters Thesis
Full Text:: . Wildl. Mgmt. 26:32-37. Brambell, F. W. R. 1944. The reproduction of the wild rabbit (Oryctolagus

Growth of channel catfish, Ictalurus punctatus (Rafinesque), fed artificial diets in ponds near Corvallis, Oregon

Creator:: Suraswadi, Plodprasop
Abstract:: The experiment was conducted at the Soap Creek farm ponds near Corvallis, Oregon. Oregon Moist Pellet and Purina Trout Chow at three different rates of feeding for each diet were used to feed fingerling channel catfish stocked at the rate of 1,000 per acre. A complete random design and Fisher's...
Resource Type:: Masters Thesis

The parr-smolt metamorphosis in steelhead trout as affected by photoperiod and temperature

Creator:: Wagner, Harry Henry
Abstract:: See pdf.
Resource Type:: Dissertation
Full Text:: acknowledged. Dr. W. S. Overton made substantial contributions to the experimental design. This study was

Social interaction between juvenile coho and fall chinook salmon in Sixes River, Oregon

Creator:: Stein, Roy A.
Abstract:: The nature of the interaction between juvenile coho salmon, Oncorhynchus kisutch (Walbaum), and fall chinook salmon, 0. tshawytscha (Walbaum), was studied in Sixes River, Oregon. Seining, snorkeling, and tagging were used to determine distribution and patterns of growth of these two species in the stream environment. Experiments conducted in flowing-water...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF ROY A. STEIN, Jr. for the MASTER

An approach to the study of multiple toxicity through the derivation and use of quantal response curves

Creator:: Anderson, Perry David
Resource Type:: Dissertation
Full Text:: , M mean daily toxicant concentration, W = weight of each lot, and h = an exponent of weight. The

Elevated temperature and the production of juvenile Chinook salmon (Oncorhynchus tshawytscha) in a model stream

Creator:: Bisson, Peter Andre
Abstract:: Temperature was elevated approximately 4° C in a model stream relative to an unheated, but otherwise similar control stream. The streams were located outdoors, received identical amounts of exchange water from a nearby creek, and followed natural diurnal and seasonal temperature cycles Juvenile spring chinook salmon (Oncorhynchus tshawytscha) were introduced...
Resource Type:: Dissertation

Seasonal properties of the coyote scent station index

Creator:: Griffith, Dennis Bradley
Abstract:: Six standard coyote scent station index lines and one scentless control line were repeatedly sampled from May through October, 1974, on a 400 square mile study area in Central Oregon. The scent station index remained relatively constant at a mean value of 0.025 from May through mid-August; increased to a...
Resource Type:: Masters Thesis
Full Text:: to work with him. I greatly appreciate the assistance of W. Scott Overton who served as my minor

Fall migration of mourning doves in the western management unit

Creator:: Miles, A. Keith
Resource Type:: Masters Thesis
Full Text:: information pertinent to this study. Special thanks to Roy Tomlinson, U.S. Fish and Wildlife Service who

ScholarsArchive@OSU

Factors affecting the abundance of fall chinook salmon in the Columbia River

Reproduction in the eastern cottontail rabbit in Oregon

The reproductive biology of the mountain cottontail rabbit in Oregon

Growth of channel catfish, Ictalurus punctatus (Rafinesque), fed artificial diets in ponds near Corvallis, Oregon

The parr-smolt metamorphosis in steelhead trout as affected by photoperiod and temperature

Social interaction between juvenile coho and fall chinook salmon in Sixes River, Oregon

An approach to the study of multiple toxicity through the derivation and use of quantal response curves

Elevated temperature and the production of juvenile Chinook salmon (Oncorhynchus tshawytscha) in a model stream

Seasonal properties of the coyote scent station index

Fall migration of mourning doves in the western management unit

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